Chain pipe-wrench.



PATENTED JUNE 30, 1908.

G. AMBORN.

CHAlN PIPE WRENCH.

APlfLIOATION FILED MAY6.1907.

INVENTOR By A f! (7x.

NEW

\ Specification of an 'eeTgail when inner d Be it known that I, GEORGE AMBORN, a citizen; of theUnited States, residing in the i-.'beneughnf fi finnok yat coun y of ngs, c y thandrStatenf ifiewYork, have invented cerairl nevmanehuseful,Improvements in Chain ,vil -ipewrenchesgiof which the following is a Specification. i j E' Ehis..inverrtion-relates to chain wrenches 1.6 and iairnsiitot providecertain improvements 1: ifihfilieifin 9.1..

i1flihewtypeiofiwrenchwto which my invention :particuiarly relates is provided with two i a-ws which arefastened to each side of a handlesorthatthey are. laterally separated, the ainirhcing ipivoted between the jaws so that imavfiswing. .todeither side-.of the latter. .hwh'erebyiieitherxoneorvthe other of the workwiin'gnfaees of theavrench may be brought into zo -opera'tion. It has heretofore been customc raryotd-pivota-the end of the chain upon a belt which extends-through the jaws and is?dian'd-iefiofthez wrench, so that the chain is 'con'nect'ed -to ithe:wrenchin a fixed central position; Phi'smode of construction is dis- -advantageousin that it either results in an 'j-insuflicint grip' pen the pipe or requires a *leii g"tli of jjai i'v whictrwould be otherwise unn'ecessaryre 5 I j 39 By my present invention I provide a *Wrencli in which the point of connection of eche che-inns shifted from side to side of the wrench as the latter is reversed to bring its opsesite working faces into operation. This may be accomplished in any suitable n1an ner, but I prefer to provide the wrench with slots in which the connecting pin of the chain moves. Such slots may be formed in any suitable way, so long as they do not follow the contour of the working face or faces of the jaws since in this case the connecting pin of the chain would slip forwardly as the wrench was turned in use.

In the drawings wherein I have shown one form of my invention, Figure 1 is an elevation of the wrench showing the jaw in the o eration of gripping the pipe from above; Fig. 2 is an elevation of the wrench reversed, the wrench being shown as operating againstthe under side of a pipe; Fig. 3 is a top or plan view of the wrench with the chain removed; Fig. 4 is a cross-section on the line 4, 4, of Fig. 2.

As shown in 55 prises a handle A the drawings the wrench cornhaving connected theren'rns nirnnr onmon YORK, N. Y., ASSIGNOR TOJ. H. WILLIAMS &. CO., OF BRO """NEW YORK, A CORPORATION OF NEW YORK.

OKLYN,

CHAIN PIPE-WRENCH.

Letters Paten't.. Patented June 30, 1908.

Application filed. May 6, 1907. Serial No. 372,036.

1 with two jaws B, B, each of which is provided with working faces a, a, The chain (3 is connected to the jaws between the latter and is provided with looking intles b, I) which are ada ted to be brou it into engagement with ocks c, 0, each of which comprises two similar hook-like parts formed upon the opposing sides of the jaws B, B.

In the preferred form of my invention the chain is connected with the jaws by apinand-slot connection, the slot of which ex tends laterally of the jaws. This construction is best seen in Figs. 3 and 4. As shown, each of the jaws is provided with an oblong slot or socket d or d, in which works a pin or shaftf. The pin f is provided with an eye or the like 9 which is preferably formed integrally with the pin, or otherwise constructed so that it maintains its position upon the middle of the latter. The shape of the slot (1 is such that while'it permits the pin f to shift from side to side, it neverthe less prevents it from slipping forwardly to such an extent in use as to prevent the proper tightening of the chain when the wrench is swung around the ipew It is important, therefore, that the s fot shall not follow the conformation of the working face or faces a, a. Instead of the pin-and-slot construction illustrated, any other mode of connecting the parts may be substituted therefor which will accomplish the desired result, It is to be observed that the principal effect of shifting the connection as herein described, as compared with a fixed central connection is that it changes the angle of the chain in useso that its inclination to the horizontal axis of the wrench is decreased. To obtain the same angularity in a centrally pivoted chain would require that the chain be pivoted a considerable distance further to the rear than with the present invention. This enables me to obtain the same angularity of the chain with a considerably shorter jaw. As the wrench is reversed in use, the pin f automatically assumes a position in the bearing face or socket at the end of the slot on that side of the wrench on which the pipe is engaged. In Fig. 1 the wrench is shown with its workin face a in engagement with the105 pipe and t e in f of the corresponding end of the slot. hese conditions are reversedin Fig. 2, which shows the wrench as applied to the under side of a pipe.

In constructing the wrench I preferably form the jaws b, with thickened portions or ribs h, h, and by the use of a suitable tool form a groove j in-each of said thickened portions to receive the handle A. The grooves j are made so shallow that they do not extend beyond the inner faces of the jaws, so that in the grooving operation the tool may be run entirely across the jaw without cutting into working portion of the latter. I also preferably form the handle so that it does not extend beyond the pivot pin f, and instead of bolting the handle and jaws together as heretofore, I prefer to rivet them together as shown at 7c iii-Fig. 3. This operation is rendered practicable bythe fact that the handle at the'point through which the rivet passes is unslotted so that it will not be distorted by the riveting operation.

'I prefer to provide a shallow slot Z, however, in the handle in front of the rivet 7c, which slot is adapted to receive the rear shoulder of the eye 9 as shown in Figs 3 and 4. With this construction the pin f is prevented from tilting sidewise in its slots (1, d and thus escaping from the latter. Any other means for efiectin'g this result may be provided. v

While I have described in detail one form of myinvention, it will be noted that I do not wish to be limited thereto since various modifications may be-made thereon without departing from the invention. It will also be noted that while I-have shown my invention as applied to a double jawed wrench, it may in some cases be applied to wrenches of other types, or to other similar devices.

What I claim is 1. In a chain wrench, the combination of a handle, a jaw having a working face on each side thereof, and a chain having its end fixed thereto by a slidingconnection, such connectioncomprising a guide on the body of the wrench, and a art connected with said chain and working a ong said guide, whereby the fixed end of the chain may act from different points of the wrench, said guide being extended ina direction which is out of parallelism with such working faces, and being adapted to hold-the chain against a forward 'slipping movement in use, and means for locking the free end of the chain.

2. In a chain wrench the combination of a handle, a jaw having working faces on each side thereof, a chain having one of its ends connected to one of said parts by a pin and slot connection, the slot of which extends across the jaw from side to side whereby the connected end of the chain lies at that end of the slot which corresponds to the side of the working face used and means for locking the free endof the chain. j

3. In a chain wrench, the combination of a handle, a jaw having working faces on each side thereof, a chain having one of its ends connected to one of said parts by a pin and slot connection, the slot of which is substantially straight and extends across the jaw from side to side whereby the connected end of the chain lies at that end of the slot which corresponds to the side of the working face used and means for locking. thefree end of the chain. I v

4. In a chain wrench, the combination of a pair of jaws spaced apart, said jaws having oppositely arranged slots extending across the jaws from side to side, a pin movable in said slots, a chain connected with said pin,

and means for locking the free end of the chain. v

' 5. In a chain wrench, the combination of a pair of jaws spaced a art; said 'aws having oppositely arranged s ots extending laterally of the jaws, a pin ino'vable in said slots, said pin having a rearwardly extending shoulder, a handle having a slot in which said shoulder is adapted to move whereby to revent tilting of said pin, a chain connecte to saidin at one end and means for locking the ot er I end of said chain.

In witness whereof, I have hereunto ned' my name in the presence of two subscri ing witnesses. I

GEORGE AMBORN.- Witnesses:

EUGENE V. MYERS, THEODORE T. SNELL. 

